He was cool

Chatting online one day because she had nothing to do, Ye-won encountered Ji Eun-Sung, one of the four kings of Sang High School, and picks a fight with him over the internet. Ji Eun-Song later calls Ye-Won and harasses her for insulting him and finds out the school Ye-Won attends, Doil High School. Angrily Ye-Won hangs up on him and later goes to the hair salon only to coincidentally meet up with Ji Eun-Sung who instantly recognizes her as the girl who insulted him. Threatening to hit her, Ye-Won escapes the scene only to have Ji threatening her again that he would find her at her school. The following school day Ye-won attempts to skip classes to avoid being seen by Ji Eun-Sung, but instead accidentally ends up kissing him while trying to hide from his gang. Due to the kiss, Ji Eun-Sung, to Ye-Won's disgust, tells Ye-Won to take responsibility for his first kiss by becoming his girlfriend and eventually marrying him! As the story progresses Ye-Won notices a more gentle and caring side of Ji Eun-Sung... (Source: Shinwonagency)